Lining element for the rehabilitation of a pipeline

Abstract

The invention relates to a lining element ( 10 ) for the rehabilitation of a pipeline, having a carrier layer ( 16 ) consisting of an expandable, resin-absorbent material which, in the longitudinal direction (L 1 , L 2 ) of the carrier layer ( 16 ), has a first expansion rigidity, and a stiffening structure ( 24 ) which, in the longitudinal direction (L 1 , L 2 ) of the carrier layer ( 16 ), has a second expansion rigidity, wherein the first expansion rigidity is lower than the second expansion rigidity and wherein the stiffening structure ( 24 ) is incorporated into the carrier layer ( 16 ).

The invention claimed is: 
     
       1. A lining element for the rehabilitation of a pipeline, having a carrier layer of an expandable, resin-absorbent material which, in the longitudinal direction of the carrier layer, has a first expansion rigidity, and a stiffening structure which, in the longitudinal direction of the carrier layer, has a second expansion rigidity, wherein the first expansion rigidity is lower than the second expansion rigidity and wherein the stiffening structure is incorporated into the carrier layer,
 wherein the stiffening structure is configured in such a manner that the expansion rigidity is unchanged in the direction transverse to the longitudinal direction, and 
 wherein the stiffening structure is formed of at least one stiffening element, and the stiffening element is formed using one or more threads extending in the longitudinal direction of the carrier layer, wherein at least one of the one or more threads has a fineness of between approximately 50 dtex and approximately 2500 dtex. 
 
     
     
       2. The lining element according to  claim 1 , wherein the stiffening structure is connected to the carrier layer in a force-fitting manner. 
     
     
       3. The lining element according to  claim 1 , wherein the stiffening element further includes at least one of tape, a layer, a plate and/or a strip. 
     
     
       4. The lining element according to  claim 1 , wherein a distance between a first thread of the one or more threads and a second thread of the one or more threads, adjacent to the first thread, is between approx. 2 mm and approx. 5 cm. 
     
     
       5. The lining element according to  claim 1 , wherein the stiffening element is formed using at least one thread and the at least one thread is produced from polyester, glass fiber, aramid and/or Kevlar. 
     
     
       6. The lining element according  claim 1 , wherein the carrier layer is formed using at least two interconnected layers. 
     
     
       7. The lining element according to  claim 6 , wherein at least one thread is arranged in a border region of the two layers. 
     
     
       8. The lining element according to  claim 7 , wherein the carrier layer is formed using a fiber material, wherein the at least one thread is incorporated, preferably needle-punched, into the carrier layer. 
     
     
       9. The lining element according to  claim 8 , wherein the carrier layer is formed using a non-woven material of ECR glass fibers. 
     
     
       10. The lining element according to  claim 1 , wherein the carrier layer is formed using a non-woven material, and wherein the non-woven material has a mixture of ECR glass fibers and synthetic fibers, preferably polyester fibers. 
     
     
       11. The lining element according to  claim 10 , wherein the mixing ratio of ECR glass fibers to polyester fibers is in the range between approx. 90% by weight ECR glass fibers and approx. 10% by weight polyester fibers up to between approx. 10% by weight ECR glass fibers and approx. 90% by weight polyester fibers. 
     
     
       12. The lining element according to  claim 1 , wherein the carrier layer has a thickness between approx. 2 mm and approx. 6 mm and wherein the carrier layer has an area weight between approx. 300 g/m2 and approx. 1000 g/m2. 
     
     
       13. The lining element according to  claim 1 , wherein the carrier layer is provided with a plastic coating and the coating has an area weight between approx. 100 g/m2 and approx. 200 g/m2. 
     
     
       14. A method for manufacturing a lining element according to  claim 1 , comprising the following steps:
 providing a carrier layer of an expandable, resin-absorbent material which, in the longitudinal direction of the carrier layer, has a first expansion rigidity; and 
 incorporating a stiffening structure into the carrier layer, wherein the stiffening structure, in the longitudinal direction of the carrier layer, has a second expansion rigidity, which is greater than the first expansion rigidity. 
 
     
     
       15. The method according to  claim 14 , wherein the carrier layer is formed using a fiber material and the incorporating the stiffening structure into the carrier layer comprises force-fitting the stiffening structure into the carrier layer. 
     
     
       16. The method according to  claim 14 , wherein the carrier layer is formed using at least two interconnected layers. 
     
     
       17. The method according to  claim 16 , wherein the interconnected layers are needled together, and the stiffening structure is incorporated into one of the layers when the two layers are being connected. 
     
     
       18. The lining element according to  claim 1 , wherein the plastic coating comprises at least one of polyvinyl chloride, polyethylene, polyurethane, or thermoplastic polyurethane. 
     
     
       19. The lining element according to  claim 1 , wherein the one or more threads comprise a plurality of spaced-apart, substantially parallel threads extending along the longitudinal direction of the carrier layer. 
     
     
       20. The lining element according to  claim 1 , wherein the one or more threads are needle-punched into the carrier layer.